RECON: TNO occultation with 78799

Event between (78799) 02XW93 and star UC4-619-030673 with event index number of 172004

Geocentric closest approach at 2018/12/09 06:16:51 UTC

J2000 position of star is 06:06:51.2 +33:46:58
Equinox of date position of star is 06:08:02.3 +33:46:47
Stellar brightness R=15.8, use SENSEUP=128
Star is 166 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 45.7 AU from the Sun and 44.7 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 1256 seconds.
The 1-sigma cross-track error in the shadow position is 5834 km.
The sky-plane scale is 32445.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 18.7 sec chord
Diameter=195.4 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 78799, (2018/12/09 06:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.4 +27:58:44  1.1 21.83 164
Alnath         05:27:29.4 +28:37:18  1.6 10.09 162
PPM 071196     06:06:49.0 +33:35:46  6.1  0.32 166
PPM 071191     06:06:39.1 +33:43:52  8.5  0.31 166
PPM 071226     06:07:56.5 +33:48:40 10.7  0.05 166
78799          06:08:06.3 +33:46:46 15.8       166
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 0.7 sigma about the mid-time.
The median site spacing is 23.9 km RECON observability=1.0 and success probability=6.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:18:42 -58.3 Dark Down 57.8 103.6 Up 06:03:42 - 06:33:42 7625
Tonasket 06:18:42 -58.4 Dark Down 57.9 103.2 Up 06:03:42 - 06:33:42 7601
Okanogan 06:18:44 -58.6 Dark Down 57.9 102.5 Up 06:03:44 - 06:33:44 7570
Brewster 06:18:45 -58.7 Dark Down 57.8 101.9 Up 06:03:45 - 06:33:45 7546
Manson/Chelan 06:18:46 -58.7 Dark Down 57.6 101.3 Up 06:03:46 - 06:33:46 7532
Entiat 06:18:46 -58.8 Dark Down 57.6 100.9 Up 06:03:46 - 06:33:46 7512
Wenatchee 06:18:47 -59.0 Dark Down 57.6 100.4 Up 06:03:47 - 06:33:47 7488
Ellensburg 06:18:48 -59.1 Dark Down 57.5 99.5 Up 06:03:48 - 06:33:48 7450
Yakima 06:18:49 -59.4 Dark Down 57.6 98.9 Up 06:03:49 - 06:33:49 7409
Toppenish/White Swan 06:18:49 -59.6 Dark Down 57.7 98.7 Up 06:03:49 - 06:33:49 7383
Pasco 06:18:46 -60.3 Dark Down 58.6 99.7 Up 06:03:46 - 06:33:46 7343
Goldendale 06:18:51 -59.8 Dark Down 57.5 97.5 Up 06:03:51 - 06:33:51 7335
The Dalles 06:18:52 -59.7 Dark Down 57.3 96.8 Up 06:03:52 - 06:33:52 7321
George/Umatilla 06:18:47 -60.5 Dark Down 58.5 98.9 Up 06:03:47 - 06:33:47 7314
PNWRO 06:18:46 -60.6 Dark Down 58.8 99.5 Up 06:03:46 - 06:33:46 7313
Maupin 06:18:52 -60.1 Dark Down 57.4 96.3 Up 06:03:52 - 06:33:52 7275
Madras/Culver 06:18:53 -60.4 Dark Down 57.4 95.4 Up 06:03:53 - 06:33:53 7220
Sisters 06:18:55 -60.4 Dark Down 57.1 94.5 Up 06:03:55 - 06:33:55 7196
Redmond 06:18:54 -60.6 Dark Down 57.4 94.8 Up 06:03:54 - 06:33:54 7184
Bend 06:18:55 -60.7 Dark Down 57.3 94.3 Up 06:03:55 - 06:33:55 7165
Oregon Observatory 06:18:56 -60.7 Dark Down 57.3 94.0 Up 06:03:56 - 06:33:56 7150
La Pine/Gilchrist 06:18:56 -60.8 Dark Down 57.2 93.6 Up 06:03:56 - 06:33:56 7130
North Lake 06:18:55 -61.4 Dark Down 57.7 93.4 Up 06:03:55 - 06:33:55 7071
Chiloquin 06:18:58 -61.2 Dark Down 57.0 91.6 Up 06:03:58 - 06:33:58 7023
Paisley 06:18:55 -61.9 Dark Down 58.0 92.8 Up 06:03:55 - 06:33:55 7006
Klamath Falls 06:18:59 -61.5 Dark Down 57.1 91.2 Up 06:03:59 - 06:33:59 6986
Tulelake 06:18:58 -61.8 Dark Down 57.3 91.0 Up 06:03:58 - 06:33:58 6951
Lakeview 06:18:55 -62.4 Dark Down 58.1 92.1 Up 06:03:55 - 06:33:55 6948
Cedarville 06:18:56 -62.9 Dark Down 58.3 91.2 Up 06:03:56 - 06:33:56 6875
Fall River/Burney 06:19:00 -62.4 Dark Down 57.4 89.6 Up 06:04:00 - 06:34:00 6854
Susanville 06:18:58 -63.2 Dark Down 57.9 89.1 Up 06:03:58 - 06:33:58 6770
Greenville 06:19:00 -63.2 Dark Down 57.7 88.5 Up 06:04:00 - 06:34:00 6748
Gimple 06:18:59 -63.2 Dark Down 57.8 88.5 Up 06:03:59 - 06:33:59 6746
Quincy 06:19:00 -63.3 Dark Down 57.7 88.1 Up 06:04:00 - 06:34:00 6727
Portola 06:18:59 -63.7 Dark Down 58.1 88.2 Up 06:03:59 - 06:33:59 6702
Reno 06:18:58 -64.2 Dark Down 58.6 88.2 Up 06:03:58 - 06:33:58 6658
Carson City 06:18:58 -64.4 Dark Down 58.6 87.6 Up 06:03:58 - 06:33:58 6620
Gardnerville 06:18:58 -64.6 Dark Down 58.6 87.2 Up 06:03:58 - 06:33:58 6593
Yerington 06:18:57 -65.0 Dark Down 59.1 87.6 Up 06:03:57 - 06:33:57 6585
Hawthorne 06:18:56 -65.6 Dark Down 59.4 87.2 Up 06:03:56 - 06:33:56 6523
Lee Vining 06:18:57 -65.5 Dark Down 59.0 86.0 Up 06:03:57 - 06:33:57 6474
Niwot 06:18:14 -71.2 Dark Down 69.6 100.3 Up 06:03:14 - 06:33:14 6454
Tonopah 06:18:52 -66.7 Dark Down 60.5 87.1 Up 06:03:52 - 06:33:52 6441
Bishop 06:18:56 -66.3 Dark Down 59.6 85.3 Up 06:03:56 - 06:33:56 6394
Beatty 06:18:52 -67.7 Dark Down 60.8 85.3 Up 06:03:52 - 06:33:52 6307
Lone Pine 06:18:56 -67.0 Dark Down 59.7 84.2 Up 06:03:56 - 06:33:56 6305
Indian Springs 06:18:49 -68.6 Dark Down 61.6 85.2 Up 06:03:49 - 06:33:49 6249
CPSLO 06:19:06 -65.7 Dark Down 57.5 81.0 Up 06:04:06 - 06:34:06 6231
Henderson 06:18:48 -69.3 Dark Down 62.1 84.5 Up 06:03:48 - 06:33:48 6177
Searchlight/Boulder City 06:18:49 -69.7 Dark Down 62.1 83.5 Up 06:03:49 - 06:33:49 6114
Patrick 06:18:45 -70.4 Dark Down 63.0 83.8 Up 06:03:45 - 06:33:45 6086
Laughlin/Bullhead City 06:18:48 -70.1 Dark Down 62.4 83.1 Up 06:03:48 - 06:33:48 6074
Kingman/Dolan Springs 06:18:46 -70.4 Dark Down 62.8 83.3 Up 06:03:46 - 06:33:46 6066
Wildwood 06:19:01 -67.8 Dark Down 59.0 79.8 Up 06:04:01 - 06:34:01 6050
Mohave Valley 06:18:48 -70.3 Dark Down 62.3 82.6 Up 06:03:48 - 06:33:48 6045
DCO 06:18:43 -71.1 Dark Down 63.5 83.5 Up 06:03:43 - 06:33:43 6039
Lake Havasu City 06:18:47 -70.6 Dark Down 62.5 81.9 Up 06:03:47 - 06:33:47 5996
Idyllwild 06:18:56 -69.3 Dark Down 60.4 79.8 Up 06:03:56 - 06:33:56 5967
Parker 06:18:48 -70.8 Dark Down 62.5 81.2 Up 06:03:48 - 06:33:48 5958
Blythe 06:18:50 -70.9 Dark Down 62.1 80.1 Up 06:03:50 - 06:33:50 5907
Calipatria 06:18:52 -70.5 Dark Down 61.3 79.0 Up 06:03:52 - 06:33:52 5875
Yuma 06:18:50 -71.3 Dark Down 61.9 78.4 Up 06:03:50 - 06:33:50 5808

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 78799, (2018/12/09 06:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 21.83 164
Alnath         05:26:17.5 +28:36:24  1.6 10.09 162
PPM 071196     06:05:34.0 +33:35:57  6.1  0.32 166
PPM 071191     06:05:24.0 +33:44:02  8.5  0.31 166
PPM 071226     06:06:41.3 +33:48:52 10.7  0.05 166
78799          06:06:51.2 +33:46:58 15.8       166
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:06:06 UT

Marc W. Buie, Southwest Research Institute

RECON